21035361 has 8 divisors (see below), whose sum is σ = 28098720. Its totient is φ = 13997792.

The previous prime is 21035359. The next prime is 21035389. The reversal of 21035361 is 16353012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21035361 - 2¹ = 21035359 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21035561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4455 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (3512340).

Almost surely, 2^21035361 is an apocalyptic number.

It is an amenable number.

21035361 is a deficient number, since it is larger than the sum of its proper divisors (7063359).

21035361 is a wasteful number, since it uses less digits than its factorization.

21035361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 21035361 is about 4586.4322735652. The cubic root of 21035361 is about 276.0471852744.

Adding to 21035361 its reverse (16353012), we get a palindrome (37388373).

The spelling of 21035361 in words is "twenty-one million, thirty-five thousand, three hundred sixty-one".